Radiological characteristics of the VBD case group
| Radiological findings | Number of patients (%) |
|---|---|
| †Percentages add up to >100% due to dual circulation infarct locations in 16 VBD patients on initial MRI; ‡v 10 (22%) in control group (p = 0.20), §v 21 (47%) in control group (p = 0.15), ¶v 13 (29%) in control group (p = 0.06). | |
| VBD location: basilar artery alone | 18 (40%) |
| Bilateral vertebral arteries | 10 (22%) |
| Basilar artery and both vertebrals | 7 (16%) |
| Unilateral vertebral artery | 8 (18%) |
| Basilar artery and single vertebral | 2 (4%) |
| Concomitant posterior circulation atherosclerosis | |
| Absent | 37 (82%) |
| Distal to dolichoectasia | 5 (11%) |
| Proximal to dolichoectasia | 2 (4%) |
| Proximal and distal to dolichoectasia | 1 (2%) |
| Anterior circulation atherosclerosis | 6 (13%)‡ |
| Infarct on initial MRI | |
| Present (all locations) | 31 (69%) |
| Anterior circulation infarcts | 27 (60%)†§ |
| Posterior circulation infarcts | 20 (44%)†¶ |
| Absent | 14 (31%) |
| Brainstem compression on initial MRI | |
| Present | 5 (11%) |
| Absent | 40 (89%) |